Knee Surg Relat Res.  2014 Sep;26(3):135-140. 10.5792/ksrr.2014.26.3.135.

Total Knee Arthroplasty Using a Posterior Cruciate Ligament Sacrificing Medial Pivot Knee: Minimum 5-year Follow-up Results

• Youm YS
• Cho SD
• Lee SH
• Cho HY

• KMID: 2223266
• DOI: http://doi.org/10.5792/ksrr.2014.26.3.135

Abstract

PURPOSE
To evaluate minimum 5-year follow-up clinical and radiological results of total knee arthroplasty (TKA) using a posterior cruciate ligament sacrificing (PS), non-substituting Advance Medial Pivot Knee.
MATERIALS AND METHODS
One hundred and twenty knees in 80 patients who could be followed up for more than 5 years after TKA using the PS Advance Medial Pivot Knee were evaluated retrospectively. The evaluations included the preoperative and postoperative range of motion (ROM), tibiofemoral angle, Knee Society (KS) knee and function scores, and Western Ontario and McMaster Universities Arthritis Index (WOMAC) score. The Kaplan-Meier method was used for survival analysis.
RESULTS
The ROM increased from a preoperative mean flexion contracture of 7.6degrees and further flexion of 115.1degrees to a postoperative mean flexion contracture of 1.5degrees and further flexion of 120.5degrees. The tibiofemoral angle was changed from 4.6degrees varus preoperatively to 5.8degrees valgus postoperatively. The KS knee and function scores as well as WOMAC score significantly improved after surgery (p<0.05). Complications developed in 4 cases (3.3%): 2 cases of periprosthetic patellar fracture (1.7%) and 2 cases of aseptic loosening (1.7%). The seven-year survival rate was 98.1% in the Kaplan-Meier survival analysis.
CONCLUSIONS
The minimum 5-year follow-up results of TKA using the PS Medial Pivot Knee were satisfactory.

Keyword

Knee; Arthroplasty; Medial Pivot

MeSH Terms

Arthritis
Arthroplasty*
Contracture
Follow-Up Studies*
Humans
Knee*
Ontario
Posterior Cruciate Ligament*
Range of Motion, Articular
Retrospective Studies
Survival Rate